[Enigmail] Expect signature header proposal

[Eitan Adler]

Robert J. Hansen wrote:
[snip[
> 
> You've defined your problem as "Enigmail doesn't give effective warnings
> in the absence of a signature."  As long as you define the problem that
> way, you will never address your underlying issue.
No: I have defined the problem as:
"Enigmail doesn't give effective warnings in the absence of an 
*expected* signature."
> 
> 
> 
> -----BEGIN PGP SIGNATURE-----
> 
> iFYEAREIAAYFAkjsEVEACgkQI4Br5da5jhAQoADgqB6ApcgXZGjyCeX5DATJuZoU
> er15V29DrvU3NwDgqJ1TKZcEva0IrZqVbaxtJqMXYjuDi2Q4TAm4lokBHAQBAQgA
> BgUCSOwRUQAKCRC3APSC/q+BCe1vB/9CuJvPVu/IgGmMmvE1mze7K5fU/GT7/akx
> lXUTY+2u3rJDBD4ptLA/NyqFwvF4Xzsep/YNOprUW6PbRg92Nm1WxGX8LAgZsemI
> btJaLFPZhCV0VqfBbsyjKaDYXNM5MzQVK7q46GqEUyGzLwAlWCZunoHWCGi55BfU
> gkiphQdNKxNwgeNwocSG7cUC2h4FOiL7RtUkY3a7EM5SSEVQ6HLOXfc+8NE/9Bnx
> c888HbY1fl68RgEAPTu/IaLKW34DfVkfOunaro9Y0ylv2V2UzdjD80CTVwRAfMf0
> mmY/jxQHuUqeb/PgP9o9L1HStWUZqQafFTiIZ56bmkadUk4Zi0Dp
> =4rC/
> -----END PGP SIGNATURE-----